diff --git a/composer.lock b/composer.lock
index 59cc6b18cd44ec5512126cb9745a0dcbb590dc84..2813f9cf9d526bd8c99b33cbc6f2566ee84aeec5 100644
--- a/composer.lock
+++ b/composer.lock
@@ -491,7 +491,7 @@
         },
         {
             "name": "drupal/core",
-            "version": "11.x-dev",
+            "version": "11.0.0-alpha1",
             "dist": {
                 "type": "path",
                 "url": "core",
@@ -652,7 +652,7 @@
         },
         {
             "name": "drupal/core-project-message",
-            "version": "11.x-dev",
+            "version": "11.0.0-alpha1",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/ProjectMessage",
@@ -685,7 +685,7 @@
         },
         {
             "name": "drupal/core-vendor-hardening",
-            "version": "11.x-dev",
+            "version": "11.0.0-alpha1",
             "dist": {
                 "type": "path",
                 "url": "composer/Plugin/VendorHardening",
@@ -9440,11 +9440,7 @@
     ],
     "aliases": [],
     "minimum-stability": "dev",
-    "stability-flags": {
-        "drupal/core": 20,
-        "drupal/core-project-message": 20,
-        "drupal/core-vendor-hardening": 20
-    },
+    "stability-flags": [],
     "prefer-stable": true,
     "prefer-lowest": false,
     "platform": [],
diff --git a/composer/Metapackage/CoreRecommended/composer.json b/composer/Metapackage/CoreRecommended/composer.json
index 1ff8f88aac7523fb193302c1f41c32676884a450..dae7bb37c0c04c898ebab51fbe36acf8a9c32434 100644
--- a/composer/Metapackage/CoreRecommended/composer.json
+++ b/composer/Metapackage/CoreRecommended/composer.json
@@ -7,7 +7,7 @@
         "webflo/drupal-core-strict": "*"
     },
     "require": {
-        "drupal/core": "11.x-dev",
+        "drupal/core": "11.0.0-alpha1",
         "asm89/stack-cors": "~v2.2.0",
         "composer/semver": "~3.4.0",
         "doctrine/annotations": "~2.0.1",
diff --git a/composer/Metapackage/PinnedDevDependencies/composer.json b/composer/Metapackage/PinnedDevDependencies/composer.json
index e1d0859f401e742a7fb0c6c1478c74b6244fb1b5..38c6127cc729305d88d2afb81ef3ce079114e87a 100644
--- a/composer/Metapackage/PinnedDevDependencies/composer.json
+++ b/composer/Metapackage/PinnedDevDependencies/composer.json
@@ -7,7 +7,7 @@
         "webflo/drupal-core-require-dev": "*"
     },
     "require": {
-        "drupal/core": "11.x-dev",
+        "drupal/core": "11.0.0-alpha1",
         "behat/mink": "v1.11.0",
         "behat/mink-browserkit-driver": "v2.2.0",
         "colinodell/psr-testlogger": "v1.3.0",
diff --git a/composer/Template/LegacyProject/composer.json b/composer/Template/LegacyProject/composer.json
index 204d1dcba1eb6ec152f3efdd116de2e9f579bdc8..9602799ba6be59aa39cf7123e35dccc14ed1a340 100644
--- a/composer/Template/LegacyProject/composer.json
+++ b/composer/Template/LegacyProject/composer.json
@@ -27,7 +27,7 @@
     "conflict": {
         "drupal/drupal": "*"
     },
-    "minimum-stability": "dev",
+    "minimum-stability": "alpha",
     "prefer-stable": true,
     "config": {
         "allow-plugins": {
diff --git a/composer/Template/RecommendedProject/composer.json b/composer/Template/RecommendedProject/composer.json
index 0b4926dabfda9080ceb2d992ffbaca187398ff0d..75d96cd9e51eac6496a2f66a6fb420b922844ecc 100644
--- a/composer/Template/RecommendedProject/composer.json
+++ b/composer/Template/RecommendedProject/composer.json
@@ -26,7 +26,7 @@
     "conflict": {
         "drupal/drupal": "*"
     },
-    "minimum-stability": "dev",
+    "minimum-stability": "alpha",
     "prefer-stable": true,
     "config": {
         "allow-plugins": {
diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index ceb4c53d5ec955e28a812c15d4a16985800947a8..336596b24180a33096ef89b46664de4cb063cd79 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -75,7 +75,7 @@ class Drupal {
   /**
    * The current system version.
    */
-  const VERSION = '11.0-dev';
+  const VERSION = '11.0.0-alpha1';
 
   /**
    * Core API compatibility.
diff --git a/core/lib/Drupal/Component/Annotation/composer.json b/core/lib/Drupal/Component/Annotation/composer.json
index 3575798a7c159c7f66f951a203d5368e3dd51a6f..86fd83a75cc20f8c4057994c3b3dc7a29735fce1 100644
--- a/core/lib/Drupal/Component/Annotation/composer.json
+++ b/core/lib/Drupal/Component/Annotation/composer.json
@@ -10,10 +10,10 @@
         "php": ">=8.3.0",
         "doctrine/annotations": "^2.0",
         "doctrine/lexer": "^2.0",
-        "drupal/core-class-finder": "11.x-dev",
-        "drupal/core-file-cache": "11.x-dev",
-        "drupal/core-plugin": "11.x-dev",
-        "drupal/core-utility": "11.x-dev"
+        "drupal/core-class-finder": "11.0.0-alpha1",
+        "drupal/core-file-cache": "11.0.0-alpha1",
+        "drupal/core-plugin": "11.0.0-alpha1",
+        "drupal/core-utility": "11.0.0-alpha1"
     },
     "autoload": {
         "psr-4": {
@@ -25,5 +25,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "dev"
+    "minimum-stability": "alpha"
 }
diff --git a/core/lib/Drupal/Component/Datetime/composer.json b/core/lib/Drupal/Component/Datetime/composer.json
index 3f99849600c572a81f5c34695fa73a1a0046f894..c18fe4c9bcf747126586e96869c07a0c7f1e8b40 100644
--- a/core/lib/Drupal/Component/Datetime/composer.json
+++ b/core/lib/Drupal/Component/Datetime/composer.json
@@ -8,7 +8,7 @@
     "license": "GPL-2.0-or-later",
     "require": {
         "php": ">=8.3.0",
-        "drupal/core-utility": "11.x-dev"
+        "drupal/core-utility": "11.0.0-alpha1"
     },
     "autoload": {
         "psr-4": {
@@ -20,5 +20,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "dev"
+    "minimum-stability": "alpha"
 }
diff --git a/core/lib/Drupal/Component/Discovery/composer.json b/core/lib/Drupal/Component/Discovery/composer.json
index 8bc8d69047e8b0fbf132830d96531b9b049d56bf..3869cc810835e729ca586f2346ab558ddd7241e4 100644
--- a/core/lib/Drupal/Component/Discovery/composer.json
+++ b/core/lib/Drupal/Component/Discovery/composer.json
@@ -8,8 +8,8 @@
     "license": "GPL-2.0-or-later",
     "require": {
         "php": ">=8.3.0",
-        "drupal/core-file-cache": "11.x-dev",
-        "drupal/core-serialization": "11.x-dev"
+        "drupal/core-file-cache": "11.0.0-alpha1",
+        "drupal/core-serialization": "11.0.0-alpha1"
     },
     "autoload": {
         "psr-4": {
@@ -21,5 +21,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "dev"
+    "minimum-stability": "alpha"
 }
diff --git a/core/lib/Drupal/Component/FrontMatter/composer.json b/core/lib/Drupal/Component/FrontMatter/composer.json
index da56de5b7efadae92ca007b3468bd0d5f026310d..5c5ecba7627355277840d9bceae71757508ccc6e 100644
--- a/core/lib/Drupal/Component/FrontMatter/composer.json
+++ b/core/lib/Drupal/Component/FrontMatter/composer.json
@@ -8,7 +8,7 @@
     "license": "GPL-2.0-or-later",
     "require": {
         "php": ">=8.3.0",
-        "drupal/core-serialization": "11.x-dev"
+        "drupal/core-serialization": "11.0.0-alpha1"
     },
     "autoload": {
         "psr-4": {
@@ -20,5 +20,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "dev"
+    "minimum-stability": "alpha"
 }
diff --git a/core/lib/Drupal/Component/Gettext/composer.json b/core/lib/Drupal/Component/Gettext/composer.json
index 94e3e6c137de730d40ee8ad94fd105a900487723..47b7abcca853667b690905a8650a3ad699d77df2 100644
--- a/core/lib/Drupal/Component/Gettext/composer.json
+++ b/core/lib/Drupal/Component/Gettext/composer.json
@@ -9,7 +9,7 @@
     },
     "require": {
         "php": ">=8.3.0",
-        "drupal/core-render": "11.x-dev"
+        "drupal/core-render": "11.0.0-alpha1"
     },
     "autoload": {
         "psr-4": {
@@ -21,5 +21,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "dev"
+    "minimum-stability": "alpha"
 }
diff --git a/core/lib/Drupal/Component/PhpStorage/composer.json b/core/lib/Drupal/Component/PhpStorage/composer.json
index bf7c2d3b42e3243e5d8ecc990f5f006781549f79..0ef9331a549ec7c73a5bf6f7582b0d3590b1891f 100644
--- a/core/lib/Drupal/Component/PhpStorage/composer.json
+++ b/core/lib/Drupal/Component/PhpStorage/composer.json
@@ -8,7 +8,7 @@
     "license": "GPL-2.0-or-later",
     "require": {
         "php": ">=8.3.0",
-        "drupal/core-file-security": "11.x-dev"
+        "drupal/core-file-security": "11.0.0-alpha1"
     },
     "autoload": {
         "psr-4": {
@@ -20,5 +20,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "dev"
+    "minimum-stability": "alpha"
 }
diff --git a/core/lib/Drupal/Component/Render/composer.json b/core/lib/Drupal/Component/Render/composer.json
index 83a3bf936a3c0046f4deaec078476b0db00a1a6a..dbd2bfc233564bbb48a2d7e5a3fc50b6dc977b1c 100644
--- a/core/lib/Drupal/Component/Render/composer.json
+++ b/core/lib/Drupal/Component/Render/composer.json
@@ -8,7 +8,7 @@
     "license": "GPL-2.0-or-later",
     "require": {
         "php": ">=8.3.0",
-        "drupal/core-utility": "11.x-dev"
+        "drupal/core-utility": "11.0.0-alpha1"
     },
     "autoload": {
         "psr-4": {
@@ -20,5 +20,5 @@
             "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
         ]
     },
-    "minimum-stability": "dev"
+    "minimum-stability": "alpha"
 }